<template>
    <el-container>
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/heima.png" alt="">
                <span>lxx电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <!-- 页面主体区域 -->
        <el-container>
            <!-- 侧边栏 -->
            <el-aside :width="iscollapse ? '64px': '200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <el-menu
                    background-color="#545c64"
                    text-color="#fff"
                    active-text-color="#ffd04b"
                    unique-opened
                    :collapse="iscollapse"
                    :collapse-transition="false"
                    router
                    :default-active='activePath'>
                    <!-- 一级菜单 -->
                    <!-- index动态绑定后点开谁就展开谁，因为之前静态绑定一个值，点一个全都展开了 -->
                    <!-- 一定要保证key的唯一性，通过：来进行动态绑定 -->
                    <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
                        <!-- 一级菜单文本区域 -->
                        <template slot="title">
                            <!-- 图标 -->
                            <i :class="iconsObj[item.id]"></i>
                            <!-- 文本 -->
                            <span>{{item.authName}}</span>
                        </template>
                        <!-- 二级菜单 -->
                        <!-- 注意这里的index也可以静态绑定，也可以不来，因为上级绑定已经不一样了 -->
                        <el-menu-item :index="'/'+ subItem.path" v-for="subItem in item.children" :key="subItem.id"
                         @click="saveNavState('/'+ subItem.path)">
                            <!-- 二级菜单文本区域 -->
                            <template slot="title">
                                <!-- 图标 -->
                                <i class="el-icon-menu"></i>
                                <!-- 文本 -->
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                        
                    </el-submenu>
                    <!-- <el-menu-item index="2">
                        <i class="el-icon-menu"></i>
                        <span slot="title">导航二</span>
                    </el-menu-item>
                    <el-menu-item index="3" disabled>
                        <i class="el-icon-document"></i>
                        <span slot="title">导航三</span>
                    </el-menu-item>
                    <el-menu-item index="4">
                        <i class="el-icon-setting"></i>
                        <span slot="title">导航四</span>
                    </el-menu-item> -->
                    </el-menu>
            </el-aside>
            <!-- 右侧主体内容 -->
            <el-main>
                <!-- 路由占位符 -->
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
    data(){
        return {
            // 左侧菜单数据
            menulist: [],
            iconsObj: {
                '125': "iconfont icon-user",
                '103': "iconfont icon-tijikongjian",
                '101': "iconfont icon-shangpin",
                '102': "iconfont icon-danju",
                '145': "iconfont icon-baobiao",
            },
            iscollapse: false,
            // 被激活的链接地址
            activePath: ''
        }
    },
    created(){
        this.getMenuList();
        this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods: {
        logout(){
            window.sessionStorage.clear();
            this.$router.push("/login");
        },
        async getMenuList(){
            const {data: res} = await this.$http.get('menus')
            if(res.meta.status !== 200) return this.$message.error(res.meta.msg);
            this.menulist = res.data;
            // console.log(res)
        },
        // 点击
        toggleCollapse(){
            this.iscollapse = ! this.iscollapse;
        },
        // 保存连接的激活状态
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath);
            this.activePath = activePath;
        }
    }
}
</script>

<style scoped>
.el-container {
    height: 100%;
}
.el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
}
.el-header div {
    display: flex;
    align-items: center;
}
.el-header div span {
    margin-left: 15px;
}
.el-aside {
    background-color: #333744;
}
.el-menu {
    border-right: none;
}
.el-main {
    background-color: #EAEDF1;
}
.iconfont {
    margin-right: 10px;
}
.toggle-button {
    background-color: #4A5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;

}
</style>